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<time class="post-full-meta-date" datetime=" 6 November 2019"> 6 November 2019</time>
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<a href='/category/react/'>REACT</a>
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<h1 class="post-full-title">Google Map API React에서 사용하기</h1>
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<h3 id="1-시작하기">1. 시작하기</h3>
<p>지도를 사용해야하는 프로젝트가 있어서,</p>
<p>국내뿐아닌 해외도 보기 쉬운 지도 관련 API를 찾다보니</p>
<p>Google maps보다 더 좋은것을 찾기 힘들어</p>
<p>해당 API와 React를 같이 사용하여 작업해봤습니다.</p>
<p>저와 같은 분들을 위해 React로 Google Map API를 사용하는 방법을</p>
<p>작성 해 보겠습니다.</p>
<p>먼저 API를 사용하기 위해 KEY값이 필요하므로</p>
<p><a href="https://cloud.google.com/maps-platform/?hl=ko&utm_source=google&utm_medium=cpc&utm_campaign=FY18-Q2-global-demandgen-paidsearchonnetworkhouseads-cs-maps_contactsal_saf&utm_content=text-ad-none-none-DEV_c-CRE_267279866547-ADGP_Hybrid+%7C+AW+SEM+%7C+BKWS+~+%5B1:1%5D+%7C+KR+%7C+KO+%7C+BK+%7C+EXA+%7C+Google+Maps+Api-KWID_43700014363279245-kwd-335425467-userloc_1009846&utm_term=KW_google%20maps%20api-ST_google+maps+api&gclid=Cj0KCQiA-4nuBRCnARIsAHwyuPpvRXFCGZ_ipmxPbCFooAm3KI-YSkiBYlPz32VXkjdfN4cQE9eNTfwaAvn2EALw_wcB&authuser=2" target="_blank">Google Maps Plat form</a> 사이트에 접속하여 KEY값을 생성합니다.</p>
<p>사이트에 접속 하여 다음과 같이 진행하여 키를 생성합니다.</p>
<p>(설정이 따로 되어있지않으면, 결제 페이지가 나옵니다)
<img src="\assets\built\images\google-maps-react\2019-11-06 173724.png" alt="img" /></p>
<p><img src="\assets\built\images\google-maps-react\2019-11-06 173728.png" alt="img" /></p>
<p><img src="\assets\built\images\google-maps-react\2019-11-06 173729.png" alt="img" /></p>
<p><img src="\assets\built\images\google-maps-react\2019-11-06 173739.png" alt="img" /></p>
<p><img src="\assets\built\images\google-maps-react\2019-11-06 174526.png" alt="img" /></p>
<p>그 후 터미널에 다음과 같이 입력하여</p>
<p>React로 프로젝트를 생성후 Google Map API를 설치합니다.</p>
<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code> npm init react-app AppName
npm install --save google-maps-react
yarn install
</code></pre></div></div>
<p>그 후 컨테이너에서 google-maps-react를 import합니다.</p>
<div class="language-javascript highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="k">import</span> <span class="p">{</span> <span class="nb">Map</span><span class="p">,</span> <span class="nx">GoogleApiWrapper</span><span class="p">,</span> <span class="nx">Marker</span> <span class="p">}</span> <span class="k">from</span> <span class="dl">'</span><span class="s1">google-maps-react</span><span class="dl">'</span><span class="p">;</span>
</code></pre></div></div>
<p>렌더링할 내용은 다음과 같습니다.</p>
<div class="language-javascript highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nx">render</span><span class="p">()</span> <span class="p">{</span>
<span class="kd">const</span> <span class="nx">mapStyles</span> <span class="o">=</span> <span class="p">{</span>
<span class="na">width</span><span class="p">:</span> <span class="dl">'</span><span class="s1">100%</span><span class="dl">'</span><span class="p">,</span>
<span class="na">height</span><span class="p">:</span> <span class="dl">'</span><span class="s1">100%</span><span class="dl">'</span><span class="p">,</span>
<span class="p">};</span>
<span class="k">return</span> <span class="p">(</span>
<span class="o"><</span><span class="nx">Fragment</span><span class="o">></span>
<span class="o"><</span><span class="nb">Map</span>
<span class="nx">google</span><span class="o">=</span><span class="p">{</span><span class="k">this</span><span class="p">.</span><span class="nx">props</span><span class="p">.</span><span class="nx">google</span><span class="p">}</span>
<span class="nx">zoom</span><span class="o">=</span><span class="p">{</span><span class="mi">18</span><span class="p">}</span>
<span class="nx">style</span><span class="o">=</span><span class="p">{</span><span class="nx">mapStyles</span><span class="p">}</span>
<span class="nx">initialCenter</span><span class="o">=</span>
<span class="o">></span>
<span class="o"><</span><span class="sr">/Map</span><span class="err">>
</span> <span class="o"><</span><span class="sr">/Fragment</span><span class="err">>
</span> <span class="p">);</span>
<span class="p">}</span>
</code></pre></div></div>
<p>또한 API를 사용하기 위한 KEY값을 설정하기 위해</p>
<p>export에 받아온 값을 저장합니다.</p>
<div class="language-javascript highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="k">export</span> <span class="k">default</span> <span class="nx">GoogleApiWrapper</span><span class="p">({</span>
<span class="na">apiKey</span><span class="p">:</span> <span class="dl">'</span><span class="s1">YOUR GOOGLE MAPS API KEY 입력</span><span class="dl">'</span>
<span class="p">})(</span><span class="nx">YourCntName</span><span class="p">);</span>
</code></pre></div></div>
<h3 id="2-사용-방법">2. 사용 방법</h3>
<ol>
<li>HandlerEvnet</li>
</ol>
<p>기본적으로 핸들러들의 형태는</p>
<p>on(HandlerEventType) 의 형태로 되어있으며,</p>
<p>다음과 같이 이벤트를 추가 할수 있습니다.</p>
<div class="language-javascript highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="o"><</span><span class="nb">Map</span>
<span class="nx">google</span><span class="o">=</span><span class="p">{</span><span class="k">this</span><span class="p">.</span><span class="nx">props</span><span class="p">.</span><span class="nx">google</span><span class="p">}</span>
<span class="nx">onClick</span> <span class="o">=</span><span class="p">{</span><span class="k">this</span><span class="p">.</span><span class="nx">onEventChecker</span><span class="p">}</span>
<span class="sr">/</span><span class="err">>
</span></code></pre></div></div>
<p>파라미터는 총 3개입니다.</p>
<p>e는 html element</p>
<p>aug는 Map에 설정된 데이터 값</p>
<p>geo는 좌표값을 받을수 있는 함수를 넘겨줍니다.</p>
<div class="language-javascript highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nx">onEventChecker</span> <span class="o">=</span> <span class="p">(</span><span class="nx">e</span><span class="p">,</span> <span class="nx">aug</span><span class="p">,</span> <span class="nx">geo</span><span class="p">)</span> <span class="o">=></span> <span class="p">{</span>
<span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span><span class="nx">e</span><span class="p">);</span>
<span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span><span class="nx">aug</span><span class="p">);</span>
<span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span><span class="nx">geo</span><span class="p">);</span>
<span class="p">}</span>
</code></pre></div></div>
<p>이러한 핸들러 이벤트를 활용하여</p>
<p>지도에 마커를 추가하는 함수를 생성해 봅시다.</p>
<div class="language-javascript highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nx">addMarkers</span> <span class="o">=</span> <span class="k">async</span> <span class="p">(</span><span class="nx">e</span><span class="p">,</span> <span class="nx">aug</span><span class="p">,</span> <span class="nx">geoData</span><span class="p">)</span> <span class="o">=></span> <span class="p">{</span>
<span class="c1">// console.log(aug);</span>
<span class="kd">const</span> <span class="p">{</span><span class="nx">stores</span><span class="p">}</span> <span class="o">=</span> <span class="k">this</span><span class="p">.</span><span class="nx">state</span><span class="p">;</span>
<span class="kd">let</span> <span class="nx">stateData</span> <span class="o">=</span> <span class="nx">stores</span><span class="p">;</span>
<span class="kd">let</span> <span class="nx">latLng</span><span class="p">;</span>
<span class="nx">latLng</span> <span class="o">=</span> <span class="p">{</span><span class="na">latitude</span> <span class="p">:</span> <span class="nx">geoData</span><span class="p">.</span><span class="nx">latLng</span><span class="p">.</span><span class="nx">lat</span><span class="p">(),</span> <span class="na">longitude</span> <span class="p">:</span> <span class="nx">geoData</span><span class="p">.</span><span class="nx">latLng</span><span class="p">.</span><span class="nx">lng</span><span class="p">()};</span>
<span class="nx">stateData</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span><span class="nx">latLng</span><span class="p">);</span>
<span class="k">await</span> <span class="k">this</span><span class="p">.</span><span class="nx">setState</span><span class="p">({</span>
<span class="na">stores</span><span class="p">:</span> <span class="nx">stateData</span>
<span class="p">});</span>
<span class="p">}</span>
</code></pre></div></div>
<p>그리고 배열을 그려주는 함수를 생성하여</p>
<p>state의 배열이 추가될때마다 마커를 추가합니다.</p>
<div class="language-javascript highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nx">displayMarkers</span> <span class="o">=</span> <span class="p">()</span> <span class="o">=></span> <span class="p">{</span>
<span class="k">return</span> <span class="k">this</span><span class="p">.</span><span class="nx">state</span><span class="p">.</span><span class="nx">stores</span><span class="p">.</span><span class="nx">map</span><span class="p">((</span><span class="nx">store</span><span class="p">,</span> <span class="nx">index</span><span class="p">)</span> <span class="o">=></span> <span class="p">{</span>
<span class="k">return</span> <span class="o"><</span><span class="nx">Marker</span> <span class="nx">key</span><span class="o">=</span><span class="p">{</span><span class="nx">index</span><span class="p">}</span> <span class="nx">id</span><span class="o">=</span><span class="p">{</span><span class="nx">index</span><span class="p">}</span> <span class="nx">position</span><span class="o">=</span> <span class="nx">label</span><span class="o">=</span><span class="p">{</span><span class="nx">store</span><span class="p">.</span><span class="nx">title</span><span class="p">}</span>
<span class="nx">onClick</span><span class="o">=</span><span class="p">{()</span> <span class="o">=></span> <span class="k">this</span><span class="p">.</span><span class="nx">removeMarkers</span><span class="p">(</span><span class="nx">index</span><span class="p">)}</span> <span class="sr">/</span><span class="err">>
</span> <span class="p">})</span>
<span class="p">}</span>
</code></pre></div></div>
<div class="language-javascript highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nx">render</span><span class="p">()</span> <span class="p">{</span>
<span class="kd">const</span> <span class="nx">mapStyles</span> <span class="o">=</span> <span class="p">{</span>
<span class="na">width</span><span class="p">:</span> <span class="dl">'</span><span class="s1">100%</span><span class="dl">'</span><span class="p">,</span>
<span class="na">height</span><span class="p">:</span> <span class="dl">'</span><span class="s1">100%</span><span class="dl">'</span><span class="p">,</span>
<span class="p">};</span>
<span class="k">return</span> <span class="p">(</span>
<span class="o"><</span><span class="nx">Fragment</span><span class="o">></span>
<span class="o"><</span><span class="nb">Map</span>
<span class="nx">google</span><span class="o">=</span><span class="p">{</span><span class="k">this</span><span class="p">.</span><span class="nx">props</span><span class="p">.</span><span class="nx">google</span><span class="p">}</span>
<span class="nx">zoom</span><span class="o">=</span><span class="p">{</span><span class="mi">18</span><span class="p">}</span>
<span class="nx">style</span><span class="o">=</span><span class="p">{</span><span class="nx">mapStyles</span><span class="p">}</span>
<span class="nx">initialCenter</span><span class="o">=</span>
<span class="nx">onClick</span><span class="o">=</span><span class="p">{</span><span class="k">this</span><span class="p">.</span><span class="nx">addMarkers</span><span class="p">}</span>
<span class="o">></span>
<span class="p">{</span><span class="k">this</span><span class="p">.</span><span class="nx">displayMarkers</span><span class="p">()}</span>
<span class="o"><</span><span class="sr">/Map</span><span class="err">>
</span> <span class="o"><</span><span class="sr">/Fragment</span><span class="err">>
</span> <span class="p">);</span>
<span class="p">}</span>
</code></pre></div></div>
<p>마커를 그려주는 함수를 잘 보시면,</p>
<p>마커를 클릭시 해당 마커를 지울수 있도록 생성된 걸</p>
<p>확인 할 수 있습니다.</p>
<p>해당 함수의 코드는 다음과 같습니다.</p>
<div class="language-javascript highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nx">removeMarkers</span> <span class="o">=</span> <span class="k">async</span> <span class="p">(</span><span class="nx">i</span><span class="p">)</span> <span class="o">=></span> <span class="p">{</span>
<span class="kd">const</span> <span class="p">{</span><span class="nx">stores</span><span class="p">}</span> <span class="o">=</span> <span class="k">this</span><span class="p">.</span><span class="nx">state</span><span class="p">;</span>
<span class="kd">let</span> <span class="nx">stateData</span> <span class="o">=</span> <span class="nx">stores</span><span class="p">;</span>
<span class="nx">stateData</span><span class="p">.</span><span class="nx">splice</span><span class="p">(</span><span class="nx">i</span><span class="p">,</span><span class="mi">1</span><span class="p">);</span>
<span class="k">await</span> <span class="k">this</span><span class="p">.</span><span class="nx">setState</span><span class="p">({</span>
<span class="na">stores</span><span class="p">:</span> <span class="nx">stateData</span>
<span class="p">})</span>
<span class="p">}</span>
</code></pre></div></div>
<p>여기까지 작성한 예제 코드를 실행 한 후</p>
<p>화면은 아래와 같습니다.
<img src="\assets\built\images\google-maps-react\img1.png" alt="img" /></p>
<p>해당 화면에서 클릭 이벤트를 실행시..
<img src="\assets\built\images\google-maps-react\img2.png" alt="img" /></p>
<p><img src="\assets\built\images\google-maps-react\img3.png" alt="img" /></p>
<ol>
<li>주소 검색</li>
</ol>
<p>먼저 검색을 할 input과 button을 렌더링합니다.</p>
<div class="language-javascript highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nx">주소</span><span class="o">/</span><span class="nx">건물</span> <span class="p">:</span> <span class="o"><</span><span class="nx">input</span> <span class="nx">value</span><span class="o">=</span><span class="p">{</span><span class="k">this</span><span class="p">.</span><span class="nx">state</span><span class="p">.</span><span class="nx">searchText</span><span class="p">}</span> <span class="nx">onChange</span><span class="o">=</span><span class="p">{(</span><span class="nx">e</span><span class="p">)</span> <span class="o">=></span> <span class="k">this</span><span class="p">.</span><span class="nx">onChangeInput</span><span class="p">(</span><span class="nx">e</span><span class="p">)}</span> <span class="sr">/</span><span class="err">>
</span> <span class="o"><</span><span class="nx">button</span> <span class="nx">onClick</span><span class="o">=</span><span class="p">{()</span><span class="o">=></span><span class="k">this</span><span class="p">.</span><span class="nx">onSearchEvent</span><span class="p">()}</span><span class="o">></span><span class="nx">검색</span><span class="o"><</span><span class="sr">/button</span><span class="err">>
</span></code></pre></div></div>
<p>그 후 state에 검색할 데이터를</p>
<p>가지고 있는 searchText를 만들어주며,</p>
<p>검색 함수를 생성합니다.</p>
<div class="language-javascript highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nx">onChangeInput</span> <span class="o">=</span> <span class="p">(</span><span class="nx">e</span><span class="p">)</span> <span class="o">=></span> <span class="p">{</span>
<span class="k">this</span><span class="p">.</span><span class="nx">setState</span><span class="p">({</span>
<span class="na">searchText</span><span class="p">:</span> <span class="nx">e</span><span class="p">.</span><span class="nx">target</span><span class="p">.</span><span class="nx">value</span>
<span class="p">})</span>
<span class="p">}</span>
<span class="nx">onSearchEvent</span> <span class="o">=</span> <span class="p">()</span> <span class="o">=></span> <span class="p">{</span>
<span class="kd">const</span> <span class="p">{</span><span class="nx">google</span><span class="p">}</span> <span class="o">=</span> <span class="k">this</span><span class="p">.</span><span class="nx">props</span><span class="p">;</span>
<span class="kd">const</span> <span class="p">{</span><span class="nx">searchText</span><span class="p">}</span> <span class="o">=</span> <span class="k">this</span><span class="p">.</span><span class="nx">state</span>
<span class="kd">let</span> <span class="nx">geocoder</span> <span class="o">=</span> <span class="k">new</span> <span class="nx">google</span><span class="p">.</span><span class="nx">maps</span><span class="p">.</span><span class="nx">Geocoder</span><span class="p">();</span>
<span class="nx">geocoder</span><span class="p">.</span><span class="nx">geocode</span><span class="p">({</span>
<span class="na">address</span><span class="p">:</span> <span class="nx">searchText</span><span class="p">,</span>
<span class="na">region</span><span class="p">:</span> <span class="dl">'</span><span class="s1">ko</span><span class="dl">'</span>
<span class="p">},</span> <span class="kd">function</span> <span class="p">(</span><span class="nx">results</span><span class="p">,</span> <span class="nx">status</span><span class="p">)</span> <span class="p">{</span>
<span class="k">if</span> <span class="p">(</span><span class="nx">status</span> <span class="o">===</span> <span class="nx">google</span><span class="p">.</span><span class="nx">maps</span><span class="p">.</span><span class="nx">GeocoderStatus</span><span class="p">.</span><span class="nx">OK</span><span class="p">)</span> <span class="p">{</span>
<span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span><span class="dl">"</span><span class="s2">RESULT OK::통신 성공</span><span class="dl">"</span><span class="p">);</span>
<span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span><span class="nx">results</span><span class="p">);</span>
<span class="p">}</span> <span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="nx">status</span> <span class="o">===</span> <span class="nx">google</span><span class="p">.</span><span class="nx">maps</span><span class="p">.</span><span class="nx">GeocoderStatus</span><span class="p">.</span><span class="nx">ERROR</span><span class="p">)</span> <span class="p">{</span>
<span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span><span class="dl">"</span><span class="s2">Error::server 통신 에러</span><span class="dl">"</span><span class="p">);</span>
<span class="p">}</span> <span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="nx">status</span> <span class="o">===</span> <span class="nx">google</span><span class="p">.</span><span class="nx">maps</span><span class="p">.</span><span class="nx">GeocoderStatus</span><span class="p">.</span><span class="nx">INVALID_REQUEST</span><span class="p">)</span> <span class="p">{</span>
<span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span><span class="dl">"</span><span class="s2">Invalid request::검색어없음</span><span class="dl">"</span><span class="p">);</span>
<span class="p">}</span> <span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="nx">status</span> <span class="o">===</span> <span class="nx">google</span><span class="p">.</span><span class="nx">maps</span><span class="p">.</span><span class="nx">GeocoderStatus</span><span class="p">.</span><span class="nx">OVER_QUERY_LIMIT</span><span class="p">)</span> <span class="p">{</span>
<span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span><span class="dl">"</span><span class="s2">Over query limit::너무 잦은 통신</span><span class="dl">"</span><span class="p">);</span>
<span class="p">}</span> <span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="nx">status</span> <span class="o">===</span> <span class="nx">google</span><span class="p">.</span><span class="nx">maps</span><span class="p">.</span><span class="nx">GeocoderStatus</span><span class="p">.</span><span class="nx">REQUEST_DENIED</span><span class="p">)</span> <span class="p">{</span>
<span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span><span class="dl">"</span><span class="s2">Geo code denied::geoCode 이용불가 API KEY 확인</span><span class="dl">"</span><span class="p">);</span>
<span class="p">}</span> <span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="nx">status</span> <span class="o">===</span> <span class="nx">google</span><span class="p">.</span><span class="nx">maps</span><span class="p">.</span><span class="nx">GeocoderStatus</span><span class="p">.</span><span class="nx">UNKNOWN_ERROR</span><span class="p">)</span> <span class="p">{</span>
<span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span><span class="dl">"</span><span class="s2">Unknown error::알수없는 에러 발생</span><span class="dl">"</span><span class="p">);</span>
<span class="p">}</span> <span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="nx">status</span> <span class="o">===</span> <span class="nx">google</span><span class="p">.</span><span class="nx">maps</span><span class="p">.</span><span class="nx">GeocoderStatus</span><span class="p">.</span><span class="nx">ZERO_RESULTS</span><span class="p">)</span> <span class="p">{</span>
<span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span><span class="dl">"</span><span class="s2">Zero result::찾는 데이터와 일치하는 데이터 존재하지않음.</span><span class="dl">"</span><span class="p">);</span>
<span class="p">}</span> <span class="k">else</span> <span class="p">{</span>
<span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span><span class="dl">"</span><span class="s2">unknown status error..</span><span class="dl">"</span><span class="p">);</span>
<span class="p">}</span>
<span class="p">})</span>
<span class="p">}</span>
</code></pre></div></div>
<p>다음은 해당 함수를 통해</p>
<p>부평구를 검색했을때 콜백받은 result의 값입니다.
<img src="\assets\built\images\google-maps-react\img4.png" alt="img" /></p>
<p>formatted_address 값이 주소명이며,</p>
<p>좌표를 가져올 수 있는 함수 또한 포함 되어 있음을</p>
<p>확인 할 수 있습니다.</p>
<ol>
<li>InfoWindow</li>
</ol>
<p>좌표에 설명하기 위한 라벨이아닌,</p>
<p>메모같은 정보창을 표시할 수 있는</p>
<p>InfoWindow가 존재합니다.</p>
<p>먼저 InfoWindow를 import 합니다.</p>
<div class="language-javascript highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="k">import</span> <span class="p">{</span> <span class="nb">Map</span><span class="p">,</span> <span class="nx">GoogleApiWrapper</span><span class="p">,</span> <span class="nx">Marker</span><span class="p">,</span> <span class="nx">InfoWindow</span> <span class="p">}</span> <span class="k">from</span> <span class="dl">'</span><span class="s1">google-maps-react</span><span class="dl">'</span><span class="p">;</span>
</code></pre></div></div>
<p>렌더링 될 때</p>
<p>엘리먼트로 넣어주면 사용이 가능합니다.</p>
<div class="language-javascript highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="o"><</span><span class="nx">InfoWindow</span>
<span class="nx">visible</span><span class="o">=</span> <span class="p">{</span><span class="nb">Boolean</span><span class="p">}</span>
<span class="nx">position</span><span class="o">=</span>
<span class="nx">content</span><span class="o">=</span> <span class="p">{</span><span class="nb">String</span><span class="p">}</span>
<span class="nx">onClose</span><span class="o">=</span> <span class="p">{</span><span class="kd">function</span><span class="p">}</span>
<span class="o">></span>
<span class="o"><</span><span class="sr">/InfoWindow></span><span class="err">
</span> <span class="c1">// 예제에 사용되는 매개변수와 타입입니다.</span>
</code></pre></div></div>
<p>onClose 같은 경우에는 기본 함수가 있으며</p>
<p>visible의 값을 false 로 바꿔줍니다.</p>
<p>이번에 사용할 방법은 Marker를 클릭시</p>
<p>infoWindow를 활성화 시키며,</p>
<p>close시 비활성화 시킬수 있도록 만들어 보겠습니다.</p>
<p>먼저 Marker의 onClick과</p>
<p>InfoWindow의 onClose에 들어갈 함수를 생성합니다.</p>
<div class="language-javascript highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nx">visibleInfoWindow</span> <span class="o">=</span> <span class="k">async</span> <span class="p">(</span><span class="nx">i</span><span class="p">)</span> <span class="o">=></span> <span class="p">{</span>
<span class="kd">const</span> <span class="p">{</span><span class="nx">stores</span><span class="p">}</span> <span class="o">=</span> <span class="k">this</span><span class="p">.</span><span class="nx">state</span><span class="p">;</span>
<span class="kd">let</span> <span class="nx">stateData</span> <span class="o">=</span> <span class="nx">stores</span><span class="p">;</span>
<span class="nx">stateData</span><span class="p">[</span><span class="nx">i</span><span class="p">].</span><span class="nx">bool</span> <span class="o">=</span> <span class="o">!</span><span class="nx">stateData</span><span class="p">[</span><span class="nx">i</span><span class="p">].</span><span class="nx">bool</span>
<span class="k">await</span> <span class="k">this</span><span class="p">.</span><span class="nx">setState</span><span class="p">({</span>
<span class="na">stores</span><span class="p">:</span> <span class="nx">stateData</span>
<span class="p">})</span>
<span class="p">}</span>
</code></pre></div></div>
<p>기존에 state의 저장 했던</p>
<p>stores의 키값에는 visible에 들어갈</p>
<p>boolean 값이 없으므로 추가해줍니다.</p>
<div class="language-javascript highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="kd">const</span> <span class="nx">latLng</span> <span class="o">=</span> <span class="p">{</span><span class="na">latitude</span><span class="p">:</span><span class="nx">lat</span><span class="p">,</span> <span class="na">longitude</span><span class="p">:</span><span class="nx">lng</span><span class="p">,</span> <span class="na">title</span><span class="p">:</span> <span class="nx">address</span><span class="p">,</span> <span class="na">bool</span><span class="p">:</span> <span class="kc">false</span><span class="p">};</span>
</code></pre></div></div>
<p>Marker를 클릭시 InfoWindow가 보여야하므로</p>
<p>onClick을 바꾸며,</p>
<p>InfoWindow의 경우</p>
<p>Marker 를 그리는 함수와 동일 한 방식으로</p>
<p>출력할 수 있도록 그리는 함수를 생성합니다.</p>
<div class="language-javascript highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nx">displayMarkers</span> <span class="o">=</span> <span class="p">()</span> <span class="o">=></span> <span class="p">{</span>
<span class="k">return</span> <span class="k">this</span><span class="p">.</span><span class="nx">state</span><span class="p">.</span><span class="nx">stores</span><span class="p">.</span><span class="nx">map</span><span class="p">((</span><span class="nx">store</span><span class="p">,</span> <span class="nx">index</span><span class="p">)</span> <span class="o">=></span> <span class="p">{</span>
<span class="k">return</span> <span class="p">(</span>
<span class="o"><</span><span class="nx">Marker</span>
<span class="nx">key</span><span class="o">=</span><span class="p">{</span><span class="nx">index</span><span class="p">}</span>
<span class="nx">position</span><span class="o">=</span>
<span class="nx">onClick</span><span class="o">=</span><span class="p">{()</span> <span class="o">=></span> <span class="k">this</span><span class="p">.</span><span class="nx">visibleInfoWindow</span><span class="p">(</span><span class="nx">index</span><span class="p">)}</span>
<span class="sr">/</span><span class="err">>
</span> <span class="p">);</span>
<span class="p">})</span>
<span class="p">}</span>
<span class="nx">displayInfoWindows</span> <span class="o">=</span> <span class="p">()</span> <span class="o">=></span> <span class="p">{</span>
<span class="k">return</span> <span class="k">this</span><span class="p">.</span><span class="nx">state</span><span class="p">.</span><span class="nx">stores</span><span class="p">.</span><span class="nx">map</span><span class="p">((</span><span class="nx">store</span><span class="p">,</span> <span class="nx">index</span><span class="p">)</span> <span class="o">=></span> <span class="p">{</span>
<span class="k">return</span> <span class="p">(</span>
<span class="o"><</span><span class="nx">InfoWindow</span>
<span class="nx">key</span><span class="o">=</span><span class="p">{</span><span class="nx">index</span><span class="p">}</span>
<span class="nx">visible</span><span class="o">=</span><span class="p">{</span><span class="nx">store</span><span class="p">.</span><span class="nx">bool</span><span class="p">}</span>
<span class="nx">position</span><span class="o">=</span>
<span class="nx">content</span><span class="o">=</span><span class="p">{</span><span class="nx">store</span><span class="p">.</span><span class="nx">title</span><span class="p">}</span>
<span class="nx">onClose</span><span class="o">=</span><span class="p">{()</span><span class="o">=></span><span class="k">this</span><span class="p">.</span><span class="nx">visibleInfoWindow</span><span class="p">(</span><span class="nx">index</span><span class="p">)}</span>
<span class="o">></span>
<span class="o"><</span><span class="sr">/InfoWindow</span><span class="err">>
</span> <span class="p">);</span>
<span class="p">})</span>
<span class="p">}</span>
</code></pre></div></div>
<p>그 후 렌더링 되는 Map 안에</p>
<p>다음과 같이 추가합니다</p>
<div class="language-javascript highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="p">{</span><span class="k">this</span><span class="p">.</span><span class="nx">displayInfoWindows</span><span class="p">()}</span>
</code></pre></div></div>
<p>예제 코드 실행시 아래와 같은 그림으로 실행됩니다.
<img src="\assets\built\images\google-maps-react\img5.png" alt="img" /></p>
<p>해당 마커를 클릭하면..
<img src="\assets\built\images\google-maps-react\img6.png" alt="img" /></p>
<p>이렇게 InfoWindow가 출력되는 것을 확인할수 있습니다.</p>
<h3 id="3-확대축소-이벤트">3. 확대/축소 이벤트</h3>
<p>이번에는 ref를 활용하여 Map의 데이터를 가져온 후</p>
<p>마우스 휠의 이벤트를 감지하여</p>
<p>state의 값으로 저장하도록 만들어 보겠습니다.</p>
<p>먼저 이벤트를 감지할 수 있도록 세팅합니다.</p>
<div class="language-javascript highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nx">componentDidMount</span> <span class="o">=</span> <span class="p">()</span> <span class="o">=></span> <span class="p">{</span>
<span class="nb">window</span><span class="p">.</span><span class="nx">addEventListener</span><span class="p">(</span><span class="dl">"</span><span class="s2">DOMMouseScrol</span><span class="dl">"</span><span class="p">,</span> <span class="k">this</span><span class="p">.</span><span class="nx">onWheelEvent</span><span class="p">,</span> <span class="kc">false</span><span class="p">);</span>
<span class="nb">window</span><span class="p">.</span><span class="nx">onmousewheel</span> <span class="o">=</span> <span class="nb">document</span><span class="p">.</span><span class="nx">onmousewheel</span> <span class="o">=</span> <span class="k">this</span><span class="p">.</span><span class="nx">onWheelEvent</span><span class="p">;</span>
<span class="p">}</span>
</code></pre></div></div>
<p>그 후 마우스가 감지되었을때 사용할 이벤트인</p>
<p>onWheelEvent 를 생성합니다.</p>
<div class="language-javascript highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nx">onWheelEvent</span> <span class="o">=</span> <span class="p">(</span><span class="nx">event</span><span class="p">)</span> <span class="o">=></span><span class="p">{</span>
<span class="kd">var</span> <span class="nx">delta</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span>
<span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="nx">event</span><span class="p">)</span> <span class="nx">event</span> <span class="o">=</span> <span class="nb">window</span><span class="p">.</span><span class="nx">event</span><span class="p">;</span>
<span class="k">if</span> <span class="p">(</span><span class="nx">event</span><span class="p">.</span><span class="nx">wheelDelta</span><span class="p">)</span> <span class="p">{</span>
<span class="nx">delta</span> <span class="o">=</span> <span class="nx">event</span><span class="p">.</span><span class="nx">wheelDelta</span><span class="o">/</span><span class="mi">120</span><span class="p">;</span>
<span class="k">if</span> <span class="p">(</span><span class="nb">window</span><span class="p">.</span><span class="nx">opera</span><span class="p">)</span> <span class="nx">delta</span> <span class="o">=</span> <span class="o">-</span><span class="nx">delta</span><span class="p">;</span>
<span class="p">}</span> <span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="nx">event</span><span class="p">.</span><span class="nx">detail</span><span class="p">)</span> <span class="nx">delta</span> <span class="o">=</span> <span class="o">-</span><span class="nx">event</span><span class="p">.</span><span class="nx">detail</span><span class="o">/</span><span class="mi">3</span><span class="p">;</span>
<span class="k">if</span> <span class="p">(</span><span class="nx">delta</span><span class="p">)</span> <span class="k">this</span><span class="p">.</span><span class="nx">onWheelHandler</span><span class="p">(</span><span class="nx">delta</span><span class="p">);</span>
<span class="p">}</span>
</code></pre></div></div>
<p>해당 이벤트가 감지되었을때 처리된 값을</p>
<p>받아줄 핸들러를 생성합니다.</p>
<div class="language-javascript highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nx">onWheelHandler</span> <span class="o">=</span> <span class="p">(</span><span class="nx">delta</span><span class="p">)</span> <span class="o">=></span> <span class="p">{</span>
<span class="kd">let</span> <span class="nx">map</span> <span class="o">=</span> <span class="k">this</span><span class="p">.</span><span class="nx">mapRef</span><span class="p">.</span><span class="nx">map</span><span class="p">;</span>
<span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span><span class="dl">"</span><span class="s2">lat::</span><span class="dl">"</span><span class="o">+</span><span class="nx">map</span><span class="p">.</span><span class="nx">center</span><span class="p">.</span><span class="nx">lat</span><span class="p">());</span>
<span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span><span class="dl">"</span><span class="s2">lng::</span><span class="dl">"</span><span class="o">+</span><span class="nx">map</span><span class="p">.</span><span class="nx">center</span><span class="p">.</span><span class="nx">lng</span><span class="p">());</span>
<span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span><span class="dl">"</span><span class="s2">zoom::</span><span class="dl">"</span><span class="o">+</span><span class="nx">map</span><span class="p">.</span><span class="nx">zoom</span><span class="p">);</span>
<span class="k">if</span> <span class="p">(</span><span class="nx">delta</span> <span class="o"><</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
<span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span><span class="dl">"</span><span class="s2">wheel down</span><span class="dl">"</span><span class="p">);</span>
<span class="p">}</span>
<span class="k">else</span> <span class="p">{</span>
<span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span><span class="dl">"</span><span class="s2">wheel up</span><span class="dl">"</span><span class="p">);</span>
<span class="p">};</span>
<span class="k">this</span><span class="p">.</span><span class="nx">setState</span><span class="p">({</span>
<span class="na">zoomIndex</span><span class="p">:</span> <span class="nx">map</span><span class="p">.</span><span class="nx">zoom</span>
<span class="p">});</span>
<span class="p">}</span>
</code></pre></div></div>
<p>참고로 리액트의 ref 사용법은</p>
<p>다음과 같이 사용됩니다</p>
<div class="language-javascript highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nx">ref</span><span class="o">=</span><span class="p">{</span><span class="nx">ref</span> <span class="o">=></span> <span class="k">this</span><span class="p">.</span><span class="nx">mapRef</span> <span class="o">=</span> <span class="nx">ref</span><span class="p">}</span>
</code></pre></div></div>
<p>이런식으로 속성값을 태그에 넣어주시면 ref값이 저장되어</p>
<p>해당 엘리먼트를 확인 가능합니다.</p>
<p>이경우 결과 값은 다음 사진과 같습니다.
<img src="\assets\built\images\google-maps-react\2-img-1.png" alt="img" /></p>
<p>다만 해당 방식으로 처리할 경우엔 스마트폰의 확대 및 축소</p>
<p>감지를 하지 못하게 되어 원래</p>
<p>사용되던 onZoomChanged 함수를 사용 하였으나,</p>
<p>작동되지않아 해당 방식으로 web에서나마</p>
<p>처리되도록 만들어 보았습니다.</p>
</div>
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